I'm guessing your calculation may look similar to the following calculation:
(This calculation is called [My Location, Selected Other])
if State=[My Location] then 'My Location'
elseif State=[Selected Location] then 'Selected Location'
Create a second calculation based off the above similar to the following and place it on the color shelf:
if [My Location, Selected Other]='My Location' then 'My Location'
elseif [My Location, Selected Other]='Selected Location' then 'Selected Location'
else 'Other Location'
Then, the other locations will always be the same color based on whatever color is chosen for Other Location.
Hope this helps!
Very clever, my friend! This is a simple, elegant solution that eluded me for days. I really appreciate your help. The only drawback I see to this approach is I lose the ability to have the actual name of the selected location appear in the legend (as opposed to the generic "Selected...") but I have the name prominently stated above the map so, little is lost and it's a small sacrifice well worth the improved user experience.